Background: Plasmablastic lymphoma (PBL) is a rare entity of non-Hodgkin lymphomas that usually occurs in the oral cavity in immunocompromised patients. PBL involving the other sites have rarely been reported. Case report: Herein, we report a rare case of EBV-negative PBL in the left breast of an immunocompetent 56-year-old woman. During physical examination, she had left breast masses and left...

Primary larynx lymphomas, specifically of the mucosa-associated lymphoid tissue, are a rare but documented phenomenon. Transformation of any type of lymphoma that has the presence of Reed-Sternberg cells is unusual in lymph nodes and exceptional in extranodal sites. Herein, we report the first case (to the best of our knowledge in a review of the English literature [MEDLINE 1966-2001]) in which...

We describe 9 cases of precursor B-cell lymphoblastic lymphoma (LYL) without evidence of marrow or blood involvement. Four patients had superficial nodal disease, 2 cutaneous involvement, and 1 each ovarian, retroperitoneal, or tonsillar primary tumor. Six patients had limited disease; 3 patients were stage III. Immunophenotyping revealed a terminal deoxynucleotidyl transferase (TdT)-positive, ...

The differential diagnosis of acute lymphoblastic leukemia (ALL) from other small round blue cell tumors in children is very important for proper treatment, but sometimes difficult. CD45 is expressed on almost all-human leukocytes and not expressed on other small round blue cell tumors. Moreover, CD19 is expressed on all stages of B lineage cells and loss of this antigen is very rare in precurs...

Primary hepatic mucosa-associated lymphoid tissue (MALT) lymphoma is an extremely rare disease. We herein describe the findings in a 74-year-old man with elevated liver enzyme levels. Dynamic computed tomography showed focal biliary dilation and atrophy in the posterior segment, while dynamic magnetic resonance images revealed a small, highly enhanced small mass located at the root of posterior...

Hemophagocytic lymphohistiocytosis (HLH) is rarely described in association with chronic lymphocytic leukemia (CLL), mostly triggered by disease progression or concurrent infection. A 68-year-old male received 4 cycles of fludarabine, cyclophosphamide, and rituximab (FCR) for CLL and achieved a complete response. Twenty-four days after the last chemotherapy, he presented with febrile neutropaen...

The duodenum is infrequently affected by malignant lymphoma, and follicular lymphomas of the duodenum are rare histological subtypes. There are no reported cases of collision of follicular lymphoma and other tumors in the ampulla of Vater. A 57-year-old Japanese man presented with jaundice, and abdominal computed tomography revealed a tumor of the ampulla of Vater invading the pancreatic head w...

which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. A 46-year-old man having back pain for 3 weeks showed multiple lymphadenopathy and epidural mass (T7-T10) on physical examination, computed tomography, and magnetic resonance imaging. Initial complete blood cell counts mature-appearing lymphocytes (62%) (A; ...

We examined the expression of CD20 in normal canine peripheral blood mononuclear cells, normal canine spleen, and canine non-Hodgkin lymphoma (NHL) to determine the feasibility of using this antigen as a diagnostic aid and as a possible target for therapy. An antibody generated against a C-terminal (intracytoplasmic) epitope of human CD20 recognized proteins of 32-36 kd in normal and malignant ...

UNLABELLED INTRODUCTION Epstein-Barr virus-positive mucocutaneous ulcer is a newly recognized clinicopathologic entity in the spectrum of Epstein-Barr virus-positive lymphoproliferative disorders. This entity is characterized by a self-limited, indolent course. CASE PRESENTATION We report the case of a 74-year-old, type 2 diabetic man who presented with an ulceroinfiltrative skin lesion on...